Usually it's not a point of rotation... The most important for fotografer is - to make the distance from the ice surfers as much is it's possible. In this case the shot looks more real - you feel verticality. And usually it's not importatnt too much the angle of rotation... Almost vertical ice - about 80-85 degrees - looks always vertical...

You will be surprise, when I tell, that took this shot and of course the climber was my friend, who did all I asked him to do.
Th procedure of doing this photo is very "simple". You should undertand, what you are doing and that you will spent a few hours in order to do just one shot.
First the climber makes first run climb up and fixing a rope, descent down. Then photografer, using fixed rope climb up to the last ice-screw and fix himself on it. Un fix a rope and through it down. Then, climber makes his climb up in second time, using already prepared ice-crew and make his HoliWood posing near to photograpfer, doing whatever photografer ask him to do - to show emotions, to make nice ice-axe positions and so on.
Photografer, being fixed with a rope, try to be outstand ice surfirs as much as he could, forming a shot and push camera bottom.
Climber makes ice-crew belay. Fix a rope. Photographer drop down, using fix rope and then climber makes his descent down...
You see- it's very easy and simple!!!